Stercorite Mineral Data
General Stercorite Information
Chemical Formula:
H(NH4)Na(PO4)•4(H2O)
Composition:
Molecular Weight = 209.07 gm
Sodium 11.00 % Na 14.82 % Na2 O
Phosphorus 14.82 % P 33.95 % P2 O5
Hydrogen 1.93 % H - % Calc as (NH4 )2 O
Hydrogen 4.34 % H 38.78 % H2 O
Nitrogen 6.70 % N 12.45 % (NH4 )2 O
Oxygen 61.22 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
H(NH4 )Na(PO4 )•4(H2 O)
Environment:
Bird and bat guano deposits.
IMA Status:
Valid Species (Pre-IMA) 1850
Locality:
Ichaboe Island, northwest of L�uderitz, Namibia. Link to MinDat.org Location Data.
Name Origin:
Named from the Latin for dung.
Name Pronunciation:
Stercorite + Pronunciation
Synonym:
ICSD 2036
PDF 24-1048
Stercorite Crystallography
Axial Ratios:
a:b:c =0.6519:1:0.6064
Cell Dimensions:
a = 6.921, b = 10.616, c = 6.438, Z = 2; alpha = 98.29°, beta = 90.42°, gamma = 71.16° V = 442.99 Den(Calc)= 1.57
Crystal System:
Triclinic - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 6.53(1), 9.93(0.95), 4.24(0.55),
Physical Properties of Stercorite
Cleavage:
None
Color:
Colorless, White, Yellowish, Brownish.
Density:
1.554
Diaphaneity:
Transparent
Hardness:
2 - Gypsum
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Stercorite
Gladstone-Dale:
CI meas = -0.304 (Poor) - where the CI = (1-KPDmeas /KC ) CI calc = -0.29 (Poor) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2866,KPDmeas = 0.2896,KC = 0.2221 Ncalc = 1.35
Optical Data:
Biaxial (+), a=1.439, b=1.442, g=1.469, bire=0.0300, 2V(Calc)=38, 2V(Meas)=35.567.
Calculated Properties of Stercorite
Electron Density:
Bulk Density (Electron Density)=1.65 gm/cc note: Specific Gravity of Stercorite =1.57 gm/cc.
Fermion Index:
Fermion Index = 0.06 Boson Index = 0.94
Photoelectric:
PEStercorite = 1.00 barns/electronU=PEStercorite x r Electron Density= 1.65 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Stercorite is Not Radioactive
Stercorite Classification
Dana Class:
39.03.01.01 (39) Hydrated Acid Phosphates, etc
(39.03) with miscellaneous formulae
(39.03.01) Dana Group
39.03.01.01 Stercorite H(NH4)Na(PO4)•4(H2O) P1 1
Strunz Class:
08.CJ.05 08 - PHOSPHATES, ARSENATES, VANADATES
08.C - Phosphates without Additional Anions, with H2O
08.CJ -With only large cations
08.CJ.05 Stercorite H(NH4)Na(PO4)•4(H2O) P1 1
Other Stercorite Information
References:
NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:
Links to other databases for Stercorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
Search for Stercorite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Stercorite :
Ask about Stercorite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Stercorite Specimen Label here :
Stercorite
H(NH4)Na(PO4)•4(H2O)
Dana No: 39.03.01.01 Strunz No: 08.CJ.05
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.